/**
 * Copyright (c) 2010 Basil Shikin, BugStat Project
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.bugstat.generators;

import java.util.Comparator;

/**
 * This class is used to compare report generators. The logic for comparison is as follows:
 * generator with larger sort priority comes before others. For equal sort priorities, compare
 * by name 
 *
 * @author Basil Shikin
 */
public class ReportGeneratorComparator
    implements Comparator<ReportGenerator>
{

    @Override
    public int compare(ReportGenerator o1, ReportGenerator o2)
    {
        if ( o1 == null && o2 != null ) return -1;
        if ( o1 != null && o2 == null ) return 1;
        if ( o1 == null && o2 == null ) return 0;
        
        
        if ( o1.getSortPriority() != o2.getSortPriority() )
        {
            return o2.getSortPriority() - o1.getSortPriority();
        }
        else
        {
            return o2.getName().compareTo( o1.getName() );
        }
    }

}
